In open pit mining,uncontrolled block instabilities have serious social,economic and regulatory consequences,such as casualties,disruption of operation and increased regulation difficulties.For this reason,bench face ...In open pit mining,uncontrolled block instabilities have serious social,economic and regulatory consequences,such as casualties,disruption of operation and increased regulation difficulties.For this reason,bench face angle,as one of the controlling parameters associated with block instabilities,should be carefully designed for sustainable mining.This study introduces a discrete fracture network(DFN)-based probabilistic block theory approach for the fast design of the bench face angle.A major advantage is the explicit incorporation of discontinuity size and spatial distribution in the procedure of key blocks testing.The proposed approach was applied to a granite mine in China.First,DFN models were generated from a multi-step modeling procedure to simulate the complex structural characteristics of pit slopes.Then,a modified key blocks searching method was applied to the slope faces modeled,and a cumulative probability of failure was obtained for each sector.Finally,a bench face angle was determined commensurate with an acceptable risk level of stability.The simulation results have shown that the number of hazardous traces exposed on the slope face can be significantly reduced when the suggested bench face angle is adopted,indicating an extremely low risk of uncontrolled block instabilities.展开更多
Face and politeness are very important parts in people’s daily communication.But people will violate the principle of politeness for protecting their own face.Therefore,they usually choose to use more humorous words ...Face and politeness are very important parts in people’s daily communication.But people will violate the principle of politeness for protecting their own face.Therefore,they usually choose to use more humorous words or jocular words to communicate in order to avoid direct contradictions.Starting from the face-threatening acts in the face theory and politeness principle,this paper briefly analyzes the face-threatening acts and its humorous usage in the TucaodahuiⅢ.展开更多
Brown ＆ Levinson＇s face theory is an important theory in Pragmatics and it is an influential theory in expounding the phenomenon of politeness. Through an analysis of the functions of ＂face＂ in English literary wo...Brown ＆ Levinson＇s face theory is an important theory in Pragmatics and it is an influential theory in expounding the phenomenon of politeness. Through an analysis of the functions of ＂face＂ in English literary works, this article intends to shed new lights on literary pragmatics.展开更多
Brown and Levinson's face theory is a theory of interpersonal relationship. It has successfully explained the influence of "face"in people's daily communications. The theory is built on the basis of ...Brown and Levinson's face theory is a theory of interpersonal relationship. It has successfully explained the influence of "face"in people's daily communications. The theory is built on the basis of western culture and ignores the cultural difference of "face"in China. It is not free from limitations the absoluteness of which exerts a checking effort on its universal applicability. This paper probes from the perspective of the influence of context and culture that the application of Face-Saving theory in actual communications in China, especially from those restrictions on the use of negative face in China.展开更多
This study explores facework in Barack Obama's public speech at Shanghai Town Hall by applying Cupach and Metts' Face Management Theory(FMT) in the realm of communication. The findings demonstrates that Cupach...This study explores facework in Barack Obama's public speech at Shanghai Town Hall by applying Cupach and Metts' Face Management Theory(FMT) in the realm of communication. The findings demonstrates that Cupach and Metts' Face Management Theory is a powerful and practicable way in explaining the politeness phenomenon in this speech and its face?work strategies can further facilitate successful communication.展开更多
Using 80 short video examples about refusal language strategies on Douyin short videos as a corpus,this study explores the commonality and individuality,as well as the contradictory relationship between Chinese and Br...Using 80 short video examples about refusal language strategies on Douyin short videos as a corpus,this study explores the commonality and individuality,as well as the contradictory relationship between Chinese and British countries in the use of refusal language strategies by combining manual and graphical data analyses.It is found that Chinese people use more indirect ways of using refusal speech acts,and British and American countries use more direct ways of using refusal speech acts.In addition to this,both Chinese and British countries use non-verbal behavior to reject speech as a way of protecting the positive face of the addressee and reducing the threatening behavior to the face of the other party.This study also found that the ambivalent relationship between the emergence of refusal language strategies in both China and Britain is related to their personal psychological state,social values,and personal face.The results of this study have some values for sociology as well as pragmatics,which is conducive to the maintenance of interpersonal relationships.展开更多
Fractal theory provides scale?independent asperity contact loads and assumes variable curvature radii in the contact analyses of rough surfaces, the current research for which mainly focuses on the mechanism study. Th...Fractal theory provides scale?independent asperity contact loads and assumes variable curvature radii in the contact analyses of rough surfaces, the current research for which mainly focuses on the mechanism study. The present study introduces the fractal theory into the dynamic research of gas face seals under face?contacting conditions. Structure?Function method is adopted to handle the surface profiles of typical carbon?graphite rings, proving the fractal con?tact model can be used in the field of gas face seals. Using a numerical model established for the dynamic analyses of a spiral groove gas face seal with a flexibly mounted stator, a comparison of dynamic performance between the Majumdar?Bhushan(MB) fractal model and the Chang?Etsion?Bogy(CEB) statistical model is performed. The result shows that the two approaches induce differences in terms of the occurrence and the level of face contact. Although the approach distinctions in film thickness and leakage rate can be tiny, the distinctions in contact mechanism and end face damage are obvious. An investigation of fractal parameters D and G shows that a proper D(nearly 1.5) and a small G are helpful in raising the proportion of elastic deformation to weaken the adhesive wear in the sealing dynamic performance. The proposed research provides a fractal approach to design gas face seals.展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.42102313 and 52104125)the Fundamental Research Funds for the Central Universities(Grant No.B240201094).
文摘In open pit mining,uncontrolled block instabilities have serious social,economic and regulatory consequences,such as casualties,disruption of operation and increased regulation difficulties.For this reason,bench face angle,as one of the controlling parameters associated with block instabilities,should be carefully designed for sustainable mining.This study introduces a discrete fracture network(DFN)-based probabilistic block theory approach for the fast design of the bench face angle.A major advantage is the explicit incorporation of discontinuity size and spatial distribution in the procedure of key blocks testing.The proposed approach was applied to a granite mine in China.First,DFN models were generated from a multi-step modeling procedure to simulate the complex structural characteristics of pit slopes.Then,a modified key blocks searching method was applied to the slope faces modeled,and a cumulative probability of failure was obtained for each sector.Finally,a bench face angle was determined commensurate with an acceptable risk level of stability.The simulation results have shown that the number of hazardous traces exposed on the slope face can be significantly reduced when the suggested bench face angle is adopted,indicating an extremely low risk of uncontrolled block instabilities.
文摘Face and politeness are very important parts in people’s daily communication.But people will violate the principle of politeness for protecting their own face.Therefore,they usually choose to use more humorous words or jocular words to communicate in order to avoid direct contradictions.Starting from the face-threatening acts in the face theory and politeness principle,this paper briefly analyzes the face-threatening acts and its humorous usage in the TucaodahuiⅢ.
文摘Brown ＆ Levinson＇s face theory is an important theory in Pragmatics and it is an influential theory in expounding the phenomenon of politeness. Through an analysis of the functions of ＂face＂ in English literary works, this article intends to shed new lights on literary pragmatics.
文摘Brown and Levinson's face theory is a theory of interpersonal relationship. It has successfully explained the influence of "face"in people's daily communications. The theory is built on the basis of western culture and ignores the cultural difference of "face"in China. It is not free from limitations the absoluteness of which exerts a checking effort on its universal applicability. This paper probes from the perspective of the influence of context and culture that the application of Face-Saving theory in actual communications in China, especially from those restrictions on the use of negative face in China.
文摘This study explores facework in Barack Obama's public speech at Shanghai Town Hall by applying Cupach and Metts' Face Management Theory(FMT) in the realm of communication. The findings demonstrates that Cupach and Metts' Face Management Theory is a powerful and practicable way in explaining the politeness phenomenon in this speech and its face?work strategies can further facilitate successful communication.
文摘Using 80 short video examples about refusal language strategies on Douyin short videos as a corpus,this study explores the commonality and individuality,as well as the contradictory relationship between Chinese and British countries in the use of refusal language strategies by combining manual and graphical data analyses.It is found that Chinese people use more indirect ways of using refusal speech acts,and British and American countries use more direct ways of using refusal speech acts.In addition to this,both Chinese and British countries use non-verbal behavior to reject speech as a way of protecting the positive face of the addressee and reducing the threatening behavior to the face of the other party.This study also found that the ambivalent relationship between the emergence of refusal language strategies in both China and Britain is related to their personal psychological state,social values,and personal face.The results of this study have some values for sociology as well as pragmatics,which is conducive to the maintenance of interpersonal relationships.
基金Supported by China Postdoctoral Science Foundation(Grant No.2017M621458)National Science and Technology Support Plan Projects(Grant No.2015BAA08B02)National Natural Science Foundation of China(Grant No.11632011),National Natural Science Foundation of China(Grant No.11372183)
文摘Fractal theory provides scale?independent asperity contact loads and assumes variable curvature radii in the contact analyses of rough surfaces, the current research for which mainly focuses on the mechanism study. The present study introduces the fractal theory into the dynamic research of gas face seals under face?contacting conditions. Structure?Function method is adopted to handle the surface profiles of typical carbon?graphite rings, proving the fractal con?tact model can be used in the field of gas face seals. Using a numerical model established for the dynamic analyses of a spiral groove gas face seal with a flexibly mounted stator, a comparison of dynamic performance between the Majumdar?Bhushan(MB) fractal model and the Chang?Etsion?Bogy(CEB) statistical model is performed. The result shows that the two approaches induce differences in terms of the occurrence and the level of face contact. Although the approach distinctions in film thickness and leakage rate can be tiny, the distinctions in contact mechanism and end face damage are obvious. An investigation of fractal parameters D and G shows that a proper D(nearly 1.5) and a small G are helpful in raising the proportion of elastic deformation to weaken the adhesive wear in the sealing dynamic performance. The proposed research provides a fractal approach to design gas face seals.
